Sony will retain the A1 as its flagship OLED TV for 2018 but will add the BRAVIA AF8 in the spring of this year. This new 4K Ultra HD TV boasts the same picture features as the A1 such as the X1 Extreme Processor, Wide Colour Gamut (WCG) and support for High Dynamic Range (HDR10, Hybrid Log-Gamma and Dolby Vision). It will also still use the Android Smart TV platform and the Acoustic Surface which turns the OLED panel into a giant speaker, thus improving the sound quality and eliminating the need for visible drivers. As a result the only real difference between the A1 and AF8 is in terms of the form factor, with the new model dropping the easel stand of the A1 for a simplified chassis that isn't at an incline and using two woofers rather than one large one. The AF8 will be available in April in screen sizes of 55-inches (KD-55AF8) and 65-inches (KD-65AF8) with a firmware update for Dolby Vision to be released later in the year.